JPS5917448A - Roll paper feeding device - Google Patents

Abstract

PURPOSE:To prevent the moisture content of roll paper from becoming larger and enable even large-sized roll paper to be fed without its waving by feeding out the roll paper after heating and dehumidifying the tip part of said paper having been unwound and waiting by a heating means. CONSTITUTION:Roll paper 2 is attached to the inside of a casing 1 via a core material 3 freely to be unwound, and a feed roller 4, a pinch roller 5, upper and lower buffles 6, 7, upper and lower heat rolls 8, 9 used as heating means, a cutting machine 10, and a conveying member 11, etc., are successively arranged in a roll paper unwinding passage. On the other hand, humidity within the casing is detected by a humidity sensor 19, and when it gets over the set level, the moisture content of the roll paper is reduced by heating and dehumidifying a waiting paper tip part while turning on electricity to the upper and lower heat rolls 8, 9. Further, the roll paper is conveyed by means of a belt 15 while sucking the roll paper into a vacuum box 14 and cooling it below prescribed temperature by means of a cooling roller 18 in case of a vacuum conveying mechanism 11, so that the roll paper is fed into a copying machine keeping a correct attitude.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a roll paper feeding device, and more particularly to a roll paper dehumidifying device.

As a roll paper feeding device, one is known in which the roll paper is rewound by a feed roller, sent to a conveying member via a pamphlet and a cutter, cut by the cutter, and fed into the interior of a duplicating machine by the conveyor member.

In a roll paper feeding device such as a roll paper, it is necessary to rewind the roll paper to a panfold located in front of the cutting machine and wait for the next paper feed.

For this reason, the part that is unwound from the roll paper and waiting is in a thin paper state, so it comes into direct contact with the atmosphere (indoor environment),
The moisture content of the paper increases greatly due to the influence of the atmosphere, especially humidity, and if the copy image is transferred to the photoreceptor in this state, the copy image will not be transferred correctly and may cause problems such as removal. Image quality will deteriorate.

Therefore, conventionally, when paper is fed after being left unattended for a period of time (for example, about 15 minutes) (in other words, when continuous copying is not performed by continuous paper feeding), the part that was on standby is completely cut off and removed. This is not preferable because the roll paper is wasted and additional cutting operations are required.

Note that the portion of the roll paper that is wound around the core material is not easily affected by the atmosphere, so its moisture content does not increase.

The present invention was made in view of the above circumstances, and its purpose is to prevent the water content from increasing by providing heating means at the leading end of the roll paper that is waiting to be rewound, and to prevent the water content from increasing. To provide a roll paper feeding device f capable of feeding even paper straight without waving.

The present invention will be described below based on embodiments shown in the drawings.

The drawing is an overall explanatory view showing one embodiment of the present invention, in which a roll paper 2 is installed in a casing 1 so as to be freely rewound via a core material 3, and a feed roller 4 is provided in the rewound path.
, pinch roller 5, upper and lower baffles 6.7, upper and lower heat rolls 8, 9 serving as heating means, cutting machine 10. Conveying member 11
etc. are arranged in order.

The cutting machine 10 includes a fixed cutter 12 and a rotary cutter 13, and is configured to cut the roll paper by rotating the rotary cutter 13.

The conveying member 11 is conveyed by a conveying belt 15 along the vacuum box 14.
The vacuum box 14 is connected to a blower 17 through a pipe 16 to form a vacuum transport mechanism, and a cooling roller IB is provided in contact with the cooling roller 1g. The roller surface is forcibly cooled by sending in cold air or atmospheric air from the outside.

Reference numeral 19 denotes a humidity detection sensor provided close to the rewinding path between the roll paper 2 and the feed roller 4. The humidity detection sensor 19 detects the humidity inside the casing and sets the set humidity (for example, 65%) υ When it comes to the top, it is passed through the upper and lower heat rolls 11i flill II.

Thus, the roll paper 2 is rewound and fed by the feed roller 4 and the pinch roller 5, guided by the upper and lower pan fluro, 7, and is waiting at the cutting machine 1o.

Then, the feed roller 4 is rotated and fed out by external paper feed (no. 3), and when a predetermined length is reached, the feed roller 4 is stopped, and the collet is synchronized with the rotary cutter 13.
Rotate to cut the roll paper.

The cut roll paper is fed by a vacuum conveyance mechanism 11 to the photoreceptor of the main body of the duplicator.

On the other hand, the humidity detection sensor 19 detects all the humidity inside the casing, and if the humidity exceeds the set humidity, the upper and lower heat rolls 8.9
The machine heats and dehumidifies the tip of the waiting roll paper to reduce its moisture content.

Then, the feed roller 4 is driven by the paper feed signal, and the paper is fed into the copying machine as described above.

At this time, the paper roll 7 is cooled by the cooling roller 18 to a temperature below a certain level (for example, below 50° C.), and then sent into the main body of the copying machine. That is, if the temperature of the roll paper exceeds a certain level, the photoreceptor will be thermally destroyed.

Therefore, the roll paper can be fed into the main body of the copying machine in a state where the humidity is below a certain level and the temperature is below a certain level, and the copy image on the photoreceptor can be correctly transferred to the roll paper, so that the image quality does not deteriorate.

In addition, in the vacuum conveyance mechanism 11, the roll paper is sucked onto the surface of the vacuum box 14 while being fed by the belt 15, so that even dog-sized roll paper can be copied in the correct orientation without being bent or wavy. It can be sent inside the machine body.

In other words, a dog-sized roll of heat roll 8.9? When heated, the paper roll becomes curved, but the blower 17 sucks the curved roll paper onto the surface of the vacuum box 1, so the curve can be corrected and fed in the correct posture.

According to the present invention, as described above, the leading edge of the rolled paper that is waiting to be rewound is heated and dehumidified by the heating means before being fed out, thereby preventing the moisture content from becoming too high.

Additionally, even dog-sized rolls of paper can be sent out straight without waving.

BRIEF DESCRIPTION OF THE DRAWINGS The drawings are overall explanatory diagrams showing one embodiment of the present invention. 1 is a casing, 2 is a roll paper, 4 is a feed roller,
Reference numerals 6 and 7 indicate upper and lower panfuls, 10 indicates a cutting machine, and 11 indicates a conveying member. Applicant Fuji Xerox Co., Ltd. Agent Patent Attorney Masaaki Yonehara Patent Attorney Tadashi Hamamoto

Claims (1)

[Claims] A feed roller 4, a pan fluro 7, a cutter 10, and a conveyance member 11 are sequentially arranged on the feed path of the roll paper 2, and after the roll paper 2 is rewound and cut by the cutter 10, the conveyance member 1 is
1. A roll paper feeding device configured to feed paper in accordance with 1, characterized in that a heating means is provided in the feeding path of the roll paper 2, and the conveyance member 11 is a vacuum conveyance mechanism.